Question 70647
{{{3a^3+3ab^2 +2a^2*b + 2b^3}}}
Look for any common factors in the first two terms
{{{3a(a^2+b^2) +2a^2*b + 2b^3}}}
Look for any common factors in the last two terms
{{{3a(a^2+b^2) +2b(a^2 + b^2)}}}
Now you have a common term of {{{a^2+b^2}}}so take that out as a common factor.
{{{(a^2+b^2) (3a+2b)}}}